Continuity mistake: In the mansion in the scene at the chess table for half the scene the chess pieces are there. The end of the scene, the pieces are gone.
Continuity mistake: When Ace first spots the raccoon on the ledge the shot of the raccoon pacing shows no other ledges to the lower right of the stranded animal. However, when Ace rescues the raccoon we see that the anchored rope is up and just left of the ledge Ace is on. (00:04:05)
Continuity mistake: In the beginning where Ace has retrieved the raccoon, the first shot of the animal looking down shows two red clips touching each other. In the next close up shot, there is only one red clip shown with no others near it. (00:05:00)
Answer: It is sung by Blues Traveler, covering the song originally written by Johnny Rivers (whose version of "Secret Agent Man" was used as the theme song for the Patrick McGoohan TV series "Danger Man").
Cubs Fan